NY Times : Voyeur-Cams Come to Home Furnishings

"But like many shoppers, I suspect, I was more intrigued by other shoppers' preferences to gain insight into what I might want to buy. I am the kind of person who will not order a meal until I have surreptitiously eyed diners at the tables to see which entrees they have chosen. In retail, as in restaurants, another consumer's interest adds value to any purchase I am considering."